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Feeding product for injection molding of titanium and titanium alloy and preparation method thereof

An injection molding and titanium alloy technology, applied in the field of titanium hydride powder injection molding feed products and its preparation, can solve the problems of complex degreasing, environmental pollution, etc., and achieve good compatibility, simple and convenient removal, and less defects Effect

Active Publication Date: 2021-09-03
湖南省民鑫新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The binder selected at the current stage is the main component of paraffin wax (PW) plus the backbone component of polymethyl methacrylate (PMMA) or polyvinyl butyral (PVB), etc., to obtain a wax-based binder , the binder has good agglomeration and high viscosity, but the degreasing is complicated, and solvent degreasing is required, which has certain pollution to the environment

Method used

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  • Feeding product for injection molding of titanium and titanium alloy and preparation method thereof
  • Feeding product for injection molding of titanium and titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. The raw material titanium hydride powder (particle size range 500 ~ 800mm) placed in a drum mill, 6.5kg mass of the powder, stainless steel ball mass 15kg, evacuated three times with argon atmosphere for protection, the milling time was 2h, after milling through a 325 mesh powder sieve sieved, to give hydrogen-containing powder particle size range D50: 20 ~ 25μm.

[0025] 2. The mixed powder was sieved with a binder, which accounted for 60% of the powder, accounting for 40% of a binder, the binder component is a polyethylene glycol (PEG) accounting for 65%, polymethacrylic acid methyl ester (PMMA) accounting for 6.7% polyvinyl butyral (PVB) accounting for 20%, ethylene - vinyl acetate copolymer (EVA) accounted for 3.3%, stearic acid (SA) accounted for 2% of paraffin accounting for 3%.

[0026] 3. The mixed powder mixing, the temperature is 200 ℃, time 3h, repeated three times and stirred under a hammer, and finally cooled to obtain feed.

[0027] 4. Feeding injection int...

Embodiment 2

[0031] 1. The raw material titanium hydride powder (particle size range 500 ~ 800mm) placed in a drum mill, 6.5kg mass of the powder, stainless steel ball mass 15kg, evacuated three times with argon atmosphere for protection, the milling time was 1.5h, after the milled powder through 325 mesh sieved, to give hydrogen-containing powder particle size range D50: 20 ~ 25μm.

[0032] 2. The sieved powder was mixed with a binder, wherein the powder accounted for 55%, accounting for 45% binder. Binder component is a polyethylene glycol (PEG) accounting for 65%, polymethyl methacrylate (PMMA) accounting for 6,7%, polyvinyl butyral (PVB) accounting for 20%, ethylene - vinyl acetate ethylene copolymer (EVA) accounted for 3.3%, stearic acid (SA) accounted for 2%, 3% Paraffin accounting.

[0033] 3. The mixed powder mixing, the temperature is 200 ℃, time 3h, repeated three times and stirred under a hammer, and finally cooled to obtain feed.

[0034] 4. Feeding injection into an injection mold...

Embodiment 3

[0038] 1. The raw material titanium hydride powder (particle size range 500 ~ 800mm) placed in a drum mill, 6.5kg mass of the powder, stainless steel ball mass 15kg, evacuated three times with argon atmosphere for protection, the milling time was 1.5h, after the milled powder through 325 mesh sieved, to give hydrogen-containing powder particle size range D50: 20 ~ 25μm.

[0039]2. Mix the powder after sieve with the binder, wherein the powder accounts for 55%, and the binder is 45%. The binder component is polyethylene glycol (PEG) to 65%, polymethyl methacrylate (PMMA) accounts for 10%, polyvinyl butyral (PVB) accounts for 15%, ethylene-vinyl acetate copolymerization (EVA) accounts for 5%, and stearic acid (SA) accounts for 2%, and the paraffin is 3%.

[0040] 3. The mixed powder is carried out with a high temperature, the temperature is 200 ° C, the time is 3 h, and the hammer is stirred repeated three times, and finally cools to obtain feed.

[0041] 4. Feeding into the syringe...

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Abstract

The invention relates to a feeding product for injection molding of titanium and titanium alloy. The raw materials of the product are composed of titanium-containing powder and a binder, wherein the titanium-containing powder accounts for 55%-60% of the total volume of the feeding product; the binder accounts for 40%-45% of the total volume of the feeding product; the binder is composed of PEG, PMMA, PVB, EVA, PW and SA; and the binder comprises the following components of, in percentage by mass, 50%-70% of PEG, 5%-10% of PMMA, 15%-25% of PVB, 1%-5% of EVA, 1%-5% of PW and 1%-5% of SA. In the injection molding process of the feeding product, the feed fluidity is good, the strength is high, the solvent degreasing rate is high, an obtained sintered blank is few in defect, good in shape preservation, low in porosity and high in strength, and it is guaranteed that the final product has excellent tissue and mechanical properties.

Description

Technical field [0001] The present invention relates to a titanium alloy injection molding technology, and in particular relates to a method for preparing feed products and a hydrogenated titanium powder injection molding. Background technique [0002] Titanium and titanium alloys have low density, high strength, corrosion resistance, good biocompatibility, non-magnetic series of advantages, etc., has a wide range of applications in the aerospace, nuclear and chemical industry, is a widely used metal materials important . [0003] Titanium and titanium alloy is difficult, high processing costs, resulting in limited application of the final product. Titanium and titanium alloy injection molding techniques have near net shape characteristics, a smaller size and precision of the parts can be mass industrial production. Titanium and titanium alloy product can be obtained by injection molding of high performance alternative structure may be used in aerospace and biomedical, weight and...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/10B22F1/00
CPCB22F3/225B22F3/1007B22F3/1021
Inventor 谢卫民陈奏君周承商
Owner 湖南省民鑫新材料股份有限公司
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